netdev - Re: [PATCH] myr10ge: again fix lro_gen

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Message-Id: <20090415.164248.188350673.davem@davemloft.net>
Date:	Wed, 15 Apr 2009 16:42:48 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	gallatin@...i.com
Cc:	brice@...i.com, sgruszka@...hat.com, netdev@...r.kernel.org,
	herbert@...dor.apana.org.au
Subject: Re: [PATCH] myr10ge: again fix lro_gen_skb() alignment

From: Andrew Gallatin <gallatin@...i.com>
Date: Wed, 15 Apr 2009 17:04:36 -0400

> Andrew Gallatin wrote:
>> Unfortunately, it doesn't appear that GRO is able to handle frags
>> (like lro_receive_frags()), so I anticipate its overhead would
> 
> Ah, I missed napi_gro_frags()!   I've got quick and dirty test
> patch which uses that, but I need to fix a few things. I also need
> to figure out why it seems to be a bit slower than LRO
> (varies from 8.5 to 9.2 Gb/s, rather than always 9.4Gb/s)
> on my old, weak 2.0GHz athlon64.

Herbert has been working on various optimizations to get
cxgb3 GRO performance on par with LRO.  Perhaps he has
some things for you to try :-)
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